The state of file managers is really annoying. I'm currently using Caja, which is a Nautilus fork for MATE, so basically Nautilus frozen in time before they yanked the spatial bit and destroyed a bunch of the rest of the usability too, and it's better but still then hampered by just undoing the latest generations of damage done to it, not trying to do better - it was never great.
To start with, I wish all of these would learn the lessons from E.g. AmigaOS of separating the "serious file manager" (which would tend to be e.g. Directory Opus or Disk Master II) from the launcher / desktop (e.g. Workbench). Though Directory Opus could be used as a Workbench replacement.
Secondly, I wish they'd all learn from the "middle ground" Workbench offered as a spatial-ish launcher: Workbench does not force only one open window for a given directory, so it's not fully spatial. It also does not remember the locations of everything unless you make it. But it does let you lay out directories spatially on the desktop and "snapshot" their locations and the locations of the files within them. And that makes it far superior as a launcher because you can organise your most used directories etc. for easy access. I get why people hated on a fully spatial launcher, but the tradeoffs of Workbench gave it the main benefits people who like spatial launchers/file managers tend to be looking for without the downsides people who hate them tend to hate the most - e.g. you can use Workbench without ever being affected by it's ability to snapshot icon positions or window positions if you prefer.
These don't make it a good file manager, but for that a multi-pane design is far better anyway and trying to shoehorn the full flexibility of a good file manager into a launcher is a folly. Dual pane + a command palette is a start, but e.g. DiskMaster II is the one I like best, because it lets your fully configure the layout with arbitrary file listing windows + arbitrary command palettes. For a file manager with that flexibility also having the option to open in tabs would be great, as long as it can be turned off.
The result of insisting on trying to combine the two seems to usually be something which is bad at both (though nothing really prevent you from making something that reuses most of the functionality to let you configure it to work like both a good launcher and a good file manager, it seems temptation then quickly turns to trying to merge the two modes)